Peter has to use the following information to find the original number: "if you double a number and then add 36 you get 4/11 of the original number." write and solve an equation to find the original number.

Abag contains 5 red marbles , 6 blue marbles and 4 green marbles. susie selects a marble and returns it to the bag before selecting another marble. if susie selects a red marble 6 out of 20 times, what is the experimental probability that the next marble she selects will be a red marble ?